| 1 | /* |
| 2 | * Copyright (c) 2008-2010 Stefano Sabatini |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include "config.h" |
| 22 | #if HAVE_UNISTD_H |
| 23 | #include <unistd.h> /* getopt */ |
| 24 | #endif |
| 25 | #include <stdio.h> |
| 26 | #include <string.h> |
| 27 | |
| 28 | #include "libavutil/channel_layout.h" |
| 29 | #include "libavutil/mem.h" |
| 30 | #include "libavutil/pixdesc.h" |
| 31 | #include "libavfilter/avfilter.h" |
| 32 | |
| 33 | #if !HAVE_GETOPT |
| 34 | #include "compat/getopt.c" |
| 35 | #endif |
| 36 | |
| 37 | static void usage(void) |
| 38 | { |
| 39 | printf("Convert a libavfilter graph to a dot file.\n"); |
| 40 | printf("Usage: graph2dot [OPTIONS]\n"); |
| 41 | printf("\n" |
| 42 | "Options:\n" |
| 43 | "-i INFILE set INFILE as input file, stdin if omitted\n" |
| 44 | "-o OUTFILE set OUTFILE as output file, stdout if omitted\n" |
| 45 | "-h print this help\n"); |
| 46 | } |
| 47 | |
| 48 | struct line { |
| 49 | char data[256]; |
| 50 | struct line *next; |
| 51 | }; |
| 52 | |
| 53 | static void print_digraph(FILE *outfile, AVFilterGraph *graph) |
| 54 | { |
| 55 | int i, j; |
| 56 | |
| 57 | fprintf(outfile, "digraph G {\n"); |
| 58 | fprintf(outfile, "node [shape=box]\n"); |
| 59 | fprintf(outfile, "rankdir=LR\n"); |
| 60 | |
| 61 | for (i = 0; i < graph->nb_filters; i++) { |
| 62 | char filter_ctx_label[128]; |
| 63 | const AVFilterContext *filter_ctx = graph->filters[i]; |
| 64 | |
| 65 | snprintf(filter_ctx_label, sizeof(filter_ctx_label), "%s\\n(%s)", |
| 66 | filter_ctx->name, |
| 67 | filter_ctx->filter->name); |
| 68 | |
| 69 | for (j = 0; j < filter_ctx->nb_outputs; j++) { |
| 70 | AVFilterLink *link = filter_ctx->outputs[j]; |
| 71 | if (link) { |
| 72 | char dst_filter_ctx_label[128]; |
| 73 | const AVFilterContext *dst_filter_ctx = link->dst; |
| 74 | |
| 75 | snprintf(dst_filter_ctx_label, sizeof(dst_filter_ctx_label), |
| 76 | "%s\\n(%s)", |
| 77 | dst_filter_ctx->name, |
| 78 | dst_filter_ctx->filter->name); |
| 79 | |
| 80 | fprintf(outfile, "\"%s\" -> \"%s\" [ label= \"inpad:%s -> outpad:%s\\n", |
| 81 | filter_ctx_label, dst_filter_ctx_label, |
| 82 | link->srcpad->name, link->dstpad->name); |
| 83 | |
| 84 | if (link->type == AVMEDIA_TYPE_VIDEO) { |
| 85 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); |
| 86 | fprintf(outfile, |
| 87 | "fmt:%s w:%d h:%d tb:%d/%d", |
| 88 | desc->name, |
| 89 | link->w, link->h, |
| 90 | link->time_base.num, link->time_base.den); |
| 91 | } else if (link->type == AVMEDIA_TYPE_AUDIO) { |
| 92 | char buf[255]; |
| 93 | av_get_channel_layout_string(buf, sizeof(buf), -1, |
| 94 | link->channel_layout); |
| 95 | fprintf(outfile, |
| 96 | "fmt:%s sr:%d cl:%s tb:%d/%d", |
| 97 | av_get_sample_fmt_name(link->format), |
| 98 | link->sample_rate, buf, |
| 99 | link->time_base.num, link->time_base.den); |
| 100 | } |
| 101 | fprintf(outfile, "\" ];\n"); |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | fprintf(outfile, "}\n"); |
| 106 | } |
| 107 | |
| 108 | int main(int argc, char **argv) |
| 109 | { |
| 110 | const char *outfilename = NULL; |
| 111 | const char *infilename = NULL; |
| 112 | FILE *outfile = NULL; |
| 113 | FILE *infile = NULL; |
| 114 | char *graph_string = NULL; |
| 115 | AVFilterGraph *graph = av_mallocz(sizeof(AVFilterGraph)); |
| 116 | char c; |
| 117 | |
| 118 | av_log_set_level(AV_LOG_DEBUG); |
| 119 | |
| 120 | while ((c = getopt(argc, argv, "hi:o:")) != -1) { |
| 121 | switch (c) { |
| 122 | case 'h': |
| 123 | usage(); |
| 124 | return 0; |
| 125 | case 'i': |
| 126 | infilename = optarg; |
| 127 | break; |
| 128 | case 'o': |
| 129 | outfilename = optarg; |
| 130 | break; |
| 131 | case '?': |
| 132 | return 1; |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | if (!infilename || !strcmp(infilename, "-")) |
| 137 | infilename = "/dev/stdin"; |
| 138 | infile = fopen(infilename, "r"); |
| 139 | if (!infile) { |
| 140 | fprintf(stderr, "Failed to open input file '%s': %s\n", |
| 141 | infilename, strerror(errno)); |
| 142 | return 1; |
| 143 | } |
| 144 | |
| 145 | if (!outfilename || !strcmp(outfilename, "-")) |
| 146 | outfilename = "/dev/stdout"; |
| 147 | outfile = fopen(outfilename, "w"); |
| 148 | if (!outfile) { |
| 149 | fprintf(stderr, "Failed to open output file '%s': %s\n", |
| 150 | outfilename, strerror(errno)); |
| 151 | return 1; |
| 152 | } |
| 153 | |
| 154 | /* read from infile and put it in a buffer */ |
| 155 | { |
| 156 | unsigned int count = 0; |
| 157 | struct line *line, *last_line, *first_line; |
| 158 | char *p; |
| 159 | last_line = first_line = av_malloc(sizeof(struct line)); |
| 160 | |
| 161 | while (fgets(last_line->data, sizeof(last_line->data), infile)) { |
| 162 | struct line *new_line = av_malloc(sizeof(struct line)); |
| 163 | count += strlen(last_line->data); |
| 164 | last_line->next = new_line; |
| 165 | last_line = new_line; |
| 166 | } |
| 167 | last_line->next = NULL; |
| 168 | |
| 169 | graph_string = av_malloc(count + 1); |
| 170 | p = graph_string; |
| 171 | for (line = first_line; line->next; line = line->next) { |
| 172 | unsigned int l = strlen(line->data); |
| 173 | memcpy(p, line->data, l); |
| 174 | p += l; |
| 175 | } |
| 176 | *p = '\0'; |
| 177 | } |
| 178 | |
| 179 | avfilter_register_all(); |
| 180 | |
| 181 | if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) { |
| 182 | fprintf(stderr, "Failed to parse the graph description\n"); |
| 183 | return 1; |
| 184 | } |
| 185 | |
| 186 | if (avfilter_graph_config(graph, NULL) < 0) |
| 187 | return 1; |
| 188 | |
| 189 | print_digraph(outfile, graph); |
| 190 | fflush(outfile); |
| 191 | |
| 192 | return 0; |
| 193 | } |